Re: [FFmpeg-devel] [PATCH v2] lavfi/drawtext: Add localtime_ms for millisecond precision

[Thilo Borgmann <thilo.borgmann@mail.de>]

Am 22.02.22 um 12:36 schrieb Thilo Borgmann:
> Am 08.02.22 um 11:41 schrieb Thilo Borgmann:
>> Am 08.02.22 um 10:27 schrieb Andreas Rheinhardt:
>>> Thilo Borgmann:
>>>> Am 01.02.22 um 00:40 schrieb Andreas Rheinhardt:
>>>>> Thilo Borgmann:
>>>>>> Am 31.01.22 um 14:08 schrieb Nicolas George:
>>>>>>> Thilo Borgman (12022-01-31):
>>>>>>>>> v10 attached.
>>>>>>>>
>>>>>>>> Also going to apply soon if there are no more comments.
>>>>>>>
>>>>>>> I think you neglected to attach the file.
>>>>>>
>>>>>> omg stupid me. Here it is...
>>>>>>
>>>>>> -Thilo
>>>>>>
>>>>>
>>>>> Seems like I misunderstood your code and ignored the outer while. Your
>>>>> code can leak if there are multiple 'N', because (as I said)
>>>>>
>>>>>>
>>>>>> +
>>>>>> +            if (fmt_new && fmt_new != argv[0] && fmt_new !=
>>>>>> fmt_default)
>>>>>> +                av_freep(&fmt_new);
>>>>>> +
>>>>>
>>>>> does not free fmt if it is already allocated. It is possible to fix this
>>>>> by adding an char *fmt_allocated = NULL; at outer scope and a fmt_new in
>>>>> the block that is executed if a 'N' is executed. (You have to free
>>>>> fmt_allocated immediately after av_asprintf().)
>>>>
>>>>> But maybe it would be best to use an AVBPrint to write the new string
>>>>> instead of allocating a new string for every %N encountered.
>>>>
>>>> v11 does it that way.
>>>>
>>>
>>>>
>>>> +    av_bprintf(&fmt_bp, "%s", fmt_begin);
>>>> +    av_bprint_finalize(&fmt_bp, (char**)&fmt);
>>>> +    if (!fmt)
>>>> +        return AVERROR(ENOMEM);
>>>> +
>>>>       av_bprint_strftime(bp, fmt, &tm);
>>>> +    av_freep(&fmt);
>>>> +
>>>
>>> This is not how one uses an AVBPrint: You are loosing the
>>> small-string-optimization that way.
>>> Furthermore, you do not check for truncation.
>>
>> v12 including IRC comments.
> 
> Ping.

Will push soon if there are no more comments.

-Thilo

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